Alexandicr G. Rutiiven" 



PLATE IX 



Figure i. Basiliscus barboiiri Ruthven; photographed in a stream on San 

 Lorenzo. 



Figure 2. Phrynonax poecilonotus (Giinther), taken on San Lorenzo. This 

 heavy-bodied snake climbs about in trees by using the tail as a prehensile organ. 



